JPH09141180A - Application utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an application utensil to apply a correction liquid, an ink for writing utensils, a liquid cosmetic, etc., to an object surface to be applied, e.g. a sheet of paper, etc. SOLUTION: In an application utensil 10 provided with an axis main body 11 comprising a container which is made of a material of mainly polypropylene and contains an ink or a coating liquid and a discharge system part 17 for the ink or the coating liquid at the tip end part of the axis main body 11, a label, a seal, or a shrinkable film consisting of an olefin-type resin layer as a base layer and a composite film 20 having chemical resistance and a gas barrier property is stuck to the surface of the axis main body 11. Consequently, the permeation amount (the evaporation amount) of the liquid content, e.g. an organic solvent, that is a problem of the axis main body made of mainly polypropylene, can be lessened and, at the same time, the alteration degree with the lapse of time can be lowered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an applicator for applying an ink or a coating liquid, and more particularly, for applying a coating liquid such as an ink for a writing instrument, a correction liquid or a liquid cosmetic to a surface to be coated such as a paper. To an applicator. The "applicator" defined in the present specification means a correction pen for applying a correction liquid to a surface to be coated, a ballpoint pen for writing ink on the surface to be coated, a writing tool such as a marking pen, and a liquid cosmetic. It refers to cosmetics and the like that are filled so as to apply.

[0002]

2. Description of the Related Art A writing instrument or the like which has been commercially available as an oil-based marker has been mainly composed of xylene as a main solvent. Therefore, an aluminum container excellent in gas barrier property is generally used as a container constituting a shaft body. . The xylene-based ink has no problem in combination with the aluminum shaft main body, but in the future, the solvent-based ink will be changed to the alcohol-based ink from the viewpoint of safety to the human body.

When an alcohol-based ink is filled in an aluminum container, there is a problem that hydrogen gas is generated due to a reaction between the water content of the alcohol-based ink and the aluminum material. Therefore, the aluminum container is used. In order to do so, it is necessary to carry out alumite treatment, which is used in food products and some cosmetics fields, and to apply a coating material to the inner surface. However, it is difficult to introduce the coating material on the inner surface with the alumite treatment or the coating material on the inner surface because the cost is high, and when applying the coating material on the inner surface, Since there are pinholes and quality is insufficient,
It is necessary to switch to a material that replaces the aluminum container.

As a material to replace the aluminum container,
A plastic container is considered, but in order to make it a plastic, the container must not be dissolved or attacked by the content liquid such as ink or coating liquid, and the permeation amount (volatilization amount) of the content liquid from the container It should be reduced to reduce the degree of aging. In the case of alcohol-based ink, it is not necessary for the material of the main body to have a high level of chemical resistance, but in consideration of the added solvent and long-term storage, some kind of ingenuity is required.

Engineering plastics (hereinafter,
"Engineering plastic material") may be used. For example, nylon and polyacrylonitrile are simple materials, but at present, engineering plastic material has a high difficulty in molding as a container for the shaft body and requires a molding cycle. However, it is difficult to adopt it as an applicator in terms of price, and it is possible to procure it in a multi-layer blow container, which is more expensive, but it is difficult to adopt it in an applicator because of its price.

On the other hand, in a conventional applicator, a polypropylene (PP) or a blow container in which engineering plastic material is partially used, or a container procured by injection molding is used as a shaft main body, and ink or coating liquid is applied to the shaft main body. Many built-in products are already on the market, and the outer peripheral surface of the shaft body mainly made of polypropylene (PP) is usually provided with a label, a seal, a shrink film or the like, on which various prints are displayed as a cover. Has been done.

As shown in Table 1 below, the water vapor permeability of the blow container made of polypropylene (PP) as a main material or the container procured by injection molding is sufficiently secured. Although it is not dissolved or corroded by the content liquid of the above, it still has a high organic vapor transmission rate, especially in the alcohol system as shown in Table 2 below.
T, biaxial stretching) and is 3 to 5 times higher.

[0008]

[Table 1]

[0009]

[Table 2]

Further, in the conventional label, seal or shrink film provided on the outer peripheral surface of the shaft body of the applicator, the form is mainly indicated, and it is generally used for aesthetic sense. The label, shrink film and the like were not used for the purpose of long-term storage.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the conventional applicator, and is intended to solve the problems. It has a very low water vapor transmission rate and is versatile in view of price and moldability. In a coating tool using a shaft main body composed of a blow container mainly made of polypropylene (PP) or a container procured by injection molding, a content liquid such as ink or coating liquid from the shaft main body,
In particular, it is an object of the present invention to provide an applicator in which the amount of permeation (volatilization amount) of an alcoholic solvent or the like is reduced to reduce the degree of change over time.

[0012]

As a result of earnest studies to solve the above-mentioned conventional problems, the present inventor has found that the water vapor permeability is extremely low, and that it is widely used in terms of price and moldability. Succeeded in obtaining a desired applicator by fixing a label, seal or shrink film having a specific structure on the outer peripheral surface of the shaft body without applying a coating material or the like on the inner surface of the shaft body mainly made of PP, The present invention has been completed. That is, the applicator of the present invention is provided with a shaft main body composed of a container whose main material is polypropylene containing ink or a coating liquid, and coating with an ink or coating liquid discharge mechanism at the tip of the shaft main body. In the ingredients,
A label, a seal or a shrink film made of a composite film layer having an olefin resin layer as a base layer and having chemical resistance and gas barrier properties is fixed to the surface of the shaft body. The composite film layer preferably includes at least one layer selected from an ethylene-vinyl acetate copolymer layer, a vinylidene chloride resin layer, and an aluminum foil layer, in addition to the olefin resin layer serving as a base layer.

In the applicator of the present invention, since the shaft main body is composed of a container mainly made of polypropylene, a sufficient water vapor transmission rate is ensured, and the outer peripheral surface of the shaft main body is provided with an olefin resin layer as a base layer. Since a label, a seal or a shrink film made of a composite film layer having chemical resistance and gas barrier property is fixed, the content of organic solvent, especially alcohol solvent, which is a problem of the shaft main body mainly made of polypropylene, The liquid permeation amount (volatilization amount) can be reduced and the degree of change over time can be reduced.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an example of an embodiment of the present invention will be described in detail with reference to FIGS. The applicator 10 of the present embodiment is used as a writing tool. As shown in FIG. 1, the shaft body 11 of the applicator 10 is composed of a container integrally formed by blow molding using polypropylene (PP) as a base material. The thickness (wall thickness) of the shaft body 11 varies depending on the application of the applicator (correction pen, ballpoint pen, marking pen, makeup tool, etc.), the content liquid (ink, cosmetic liquid) to be filled in the shaft body, the moldability, etc. 0.5
mm or more, preferably 0.8 to 1.2 mm. The polypropylene (PP) used may be unstretched, uniaxially stretched, biaxially stretched, or the like.

On the outer peripheral surface of the shaft main body 11, there is provided a composite film layer 20 having a chemical resistance and a gas barrier property, which has an olefin resin layer such as polyethylene (PE) or polypropylene (PP) as a base layer (lower layer). It is fixed by sticking or the like. The composite film layer 20 is fixed as a label, a seal, or a shrink film by sticking or the like, and also has a function as a display or an aesthetic feeling. The base layer (lower layer) of the composite film layer 20 is an olefin resin layer of the same type from the viewpoint of adhesion because the shaft body 11 is an olefin resin having polypropylene as a main material.

As the composite film layer 20, for example, PET / PE, vinylidene chloride resin (S
r) / PE, PET / PP two-layer structure, PET / aluminum foil (Al) / high-density polyethylene (HDPE), oriented polypropylene (OPP) / Al / PE, PP / ethylene-vinyl acetate copolymer (EVA) ) / PP, PE / Sr
/ PE, PE / polyacetal (POM) / PE, and other three-layer structures. Of these composite film layers 20, in addition to the olefin resin layer serving as the base layer, an EVA layer, a Sr layer, and an Al layer, which are much more excellent in chemical resistance and gas barrier properties than the olefin resin layer, are selected. With at least one layer, eg Sr / P
E, PET / Al / HDPE, OPP / Al / PE, P
If it is a composite film layer of P / EVA / PP, PE / Sr / PE, a composite film layer without EVA, Sr and Al layers, for example PET / PE, PE
The chemical resistance and gas barrier property are further improved as compared with T / PP. The composite film layer 20 shown in FIGS. 1 and 2 has a two-layer structure including an Sr layer 21 / PE layer 22. In addition, the composite film layer 20
The respective layers can be composited by a method of laminating (bonding) with an adhesive, an extrusion laminating method of extrusion coating a sealant resin, a method of producing a composite film by coextrusion, a thermal laminating method, or the like.

The thickness of the composite film layer 20 varies depending on the thickness of the shaft main body 11, the application of the applicator, the content liquid, etc., but is 50 to 100 μm. In addition, the thickness of each layer of the composite film layer 20,
For example, the thickness of each of the PET layer / Al layer / HDPE layer also varies depending on the thickness of the shaft body 11, the application of the applicator described above, the content liquid, etc., and the thickness of the composite film layer 20 is 50 to 100 μm. The thickness of each layer varies within the range. Further, the composite film layer 20
The fixed area of 60% of the total surface of the shaft body 11 is
It should preferably be 80% or more. When the fixing area of the composite film layer 20 is less than 60%, the permeation amount (volatilization of the content liquid such as an organic solvent, particularly an alcohol solvent, which is a problem of the shaft body mainly made of polypropylene which is the object of the present invention, is a problem. Therefore, the amount) cannot be reduced and the degree of change over time cannot be reduced.

As shown in FIGS. 1 and 3, a threaded portion 12 is provided at the tip of the shaft body 11, and a tip shaft 13 is screwed into the threaded portion 12. Also, the shaft body 11
Ink for a writing instrument and a stirring ball 14 are incorporated therein. A discharge mechanism portion 17 including a valve body portion 15 and a pen core 16 is provided in the shaft body 11 and the tip shaft 13. The shaft main body 11 shown in FIG.
2 and the composite film layer 20 is fixed to the entire outer peripheral surface except the rear end surface of the shaft body by sticking.

In the applicator 10 of the present embodiment thus constructed, the shaft main body 11 is composed of a container whose main material is polypropylene, so that the water vapor permeability is sufficiently secured as shown in Table 2. On the surface of the shaft body 11,
Since the label, the seal or the shrink film made of the composite film layer 20 having the chemical resistance and the gas barrier property based on the olefin resin layer is fixed by sticking or the like, it is a problem of the container mainly made of polypropylene. The permeation amount (volatilization amount) of the content liquid such as the organic solvent can be reduced, and the degree of change over time can be reduced.

The applicator of the present invention is constructed and used as described above, but is not limited to the above embodiment. The applicator of the present invention comprises a container whose main shaft body is made of polypropylene as a main material, and an applicator having a mechanism for discharging ink or coating liquid at the tip of the shaft main body, wherein the surface of the shaft main body is: Chemical resistance based on the olefin resin layer, a label consisting of a composite film layer having gas barrier properties, the seal or shrink film is affixed, the shaft body of the above configuration, The structure, shape, and molding method of the other shaft bodies are not particularly limited.

In the above embodiment, the shaft main body 11 integrally molded by blow molding is used, but the molding method of the shaft main body 11 is not limited, and it may be composed of, for example, a container molded by injection molding. Also, the shaft body may have a tail plug press-fitted, ultrasonically welded, or fixed by an adhesive agent or the like to the rear end portion of the cylindrical container. Further, the ejection mechanism may be an ejection mechanism such as a brush structure or a ballpoint pen structure in addition to the pen core described in the above embodiment as long as it can eject the content liquid such as ink or coating liquid. The structure of the part is not limited in any way.

Furthermore, the composite film layer 20
If it has chemical resistance and gas barrier,
The ink is not limited to the configuration of the above embodiment,
Various materials can be used depending on the type and properties of the content liquid such as cosmetic liquid, and the polymerization order of the material (layer) and the number of layers are not limited, and further, chemical resistance and gas barrier property The thickness of the EVA layer, the Sr layer and the Al layer can be increased to improve the thickness. Further, the composite film layer 20 may be fixed to the surface of the front shaft 13 in order to improve chemical resistance and gas barrier property.

Next, the present invention will be described more specifically with reference to examples. In addition, this invention is not limited to a following example.

(Example 1) A seal made of a composite film layer 20 having the following constitution was adhered to the surface of a shaft body 11 of an applicator 10 having a pen core structure shown in FIG. The composite film layer 20 is PET 12 μm /
A shaft main body 11 having a PE 50 μm double-layered structure is provided except for the threaded portion 12 of the shaft main body 11 and the rear end surface of the shaft main body 11.
On the outer peripheral surface of the shaft body
) Was fixed by sticking. The description of the writing instrument was displayed on the seal surface.

(Example 2) A label composed of a composite film layer 20 having the following constitution was adhered to the surface of the shaft main body 11 of the applicator 10 having the pen core structure shown in FIG. The composite film layer 20 is PET 12 μm /
A label having a three-layer structure of Al 20 μm / HDPE 50 μm is attached to the outer peripheral surface of the shaft body 11 excluding the screwing portion 12 of the shaft body 11 and the rear end surface of the shaft body 11 (80% of the total surface area of the shaft body 11 is ) It adhered by sticking.

(Embodiment 3) The surface of the shaft main body 11 of the applicator 10 having the pen core structure shown in FIG. 1 is covered with a heat-shrinkable film composed of the composite film layer 20 having the following constitution, and shrinked by hot air to be fixed. did. The composite film layer 20 is made of PP40 μm / EVA 20 μm / PP40
A shrink film having a three-layer structure of μm was fixed to the outer peripheral surface of the shaft body 11 (80% of the total surface area of the shaft body 11) excluding the screwing portion 12 of the shaft body 11.

(Example 4) Composite film layer 20
Was prepared in the same manner as in Example 1 except that the seal had a three-layer structure of PET 12 μm / Al 20 μm / HDPE 50 μm.

(Example 5) Composite film layer 20
Was produced in the same manner as in Example 1 except that the seal was a seal having a three-layer structure of PP 40 μm / EVA 20 μm / PP 40 μm.

[0029]

According to the first aspect of the present invention, since the shaft main body is composed of a container whose main material is polypropylene, the water vapor transmission rate is sufficiently ensured and the olefin resin layer is formed on the surface of the shaft main body. Since a label, a seal or a shrink film made of a composite film layer having chemical resistance and a gas barrier property as a base layer is fixed, the permeation amount of a content liquid such as an organic solvent which is a problem of a container mainly made of polypropylene ( (EN) Provided is an applicator capable of decreasing the amount of volatilization) and reducing the degree of change over time. According to claim 2, in the composite film layer, in addition to the olefin resin layer serving as a base layer, at least one layer selected from an EVA layer, a Sr layer and an Al layer which are remarkably excellent in chemical resistance and gas barrier property. Therefore, an applicator having improved chemical resistance and gas barrier property is provided.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing an example of a shaft body used in the present invention.

FIG. 2 is an enlarged sectional view of FIG.

FIG. 3 is a partial sectional view showing an example of the applicator of the present invention.

[Explanation of symbols]

 10 Applicator 11 Shaft main body 13 Tip shaft 17 Discharge mechanism section 20 Composite film layer

Claims (2)

[Claims] 1. An applicator having a shaft main body composed of a container mainly made of polypropylene containing ink or coating liquid, and having an ink or coating liquid discharging mechanism at the tip of the shaft main body. An applicator characterized in that a label, a seal or a shrink film made of a composite film layer having an olefin resin layer as a base layer and having chemical resistance and gas barrier properties is fixed to the surface of the shaft body. 2. The composite film layer comprises at least one layer selected from at least an ethylene-vinyl acetate copolymer layer, a vinylidene chloride resin layer and an aluminum foil layer, in addition to an olefin resin layer serving as a base layer. The applicator according to claim 1.